Author: Dann Corbit
Date: 13:54:21 03/04/06
Go up one level in this thread
On March 04, 2006 at 16:48:33, Dann Corbit wrote: >On March 04, 2006 at 16:30:09, Charles Roberson wrote: > >> >> >> Telepath drew a won endgame in a blitz match this week. The position is: >> 8/8/8/5BB1/8/3p1kpp/7P/7K w - - 0 76 >> >> It only searched 6 ply and played Bxh3. OOPS!! I thought your program played Bxd3. Bxh3 is just awful. Bxd3 wins also, but hxg3 is the clear choice here. If he tries to push the pawn towards queen by backing with his king, you cough up a bishop for a queen. And if he takes it with his king, you clear off all of his pawns easily and do the diagonal bishop dance for an easy win. >> At 10 ply it played Bxd3. >> >> Seems to me the better move is Bxd3 or h2xg3. >> I've tried upping the outside passer value by 4x and adjusting >> the code to call the d3 pawn an outside passer. Now, it makes >> Bxd3 at 9 ply and h2xg3 at 10 ply then Bxd3 at 11 ply. >> >> Seems I should be able to adjust it to see this earlier or would >> that be overtuning? > >Rybka likes Kg1 (which wins, but is a very puzzling choice because hxg3 >obviously wins very easily.) Considering Rybka's long struggle to get off of >the drawing Bxd3 I would not be too worried about it if my program struggled >with it a while also. However, a 6 ply depth is a great concern if your program >has more than one second of think time. Why so shallow? Severe time pressure? > >Analysis from e:\ttt.epd >3/4/2006 1:34:36 PM Level: 999 Seconds >Analyzing engine: Rybka v1.01 Preview 2.w32 > >1) 0 76 > Avoid move: > Best move (Rybka v1.01 Preview 2.w32): Kh1-g1 > Not found in: 16:39 > 3 00:00 5.744 74.453 +6.63 Bf5xd3 > 4 00:00 7.300 78.686 +6.95 Bf5xd3 > 5 00:00 8.974 82.787 +5.80 Bf5xd3 Kf3g4 > 6 00:00 11.816 109.005 +6.69 Bf5xd3 Kf3g4 Bg5c1 > 7 00:00 7.248 58.904 +6.69 Bf5xd3 Kf3g4 Bg5c1 g3g2+ Kh1g1 Kg4h5 > 8 00:00 19.898 107.807 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 > 9 00:00 40.591 155.674 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 > 10 00:00 80.591 187.984 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 > 11 00:00 150.801 209.810 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 > 12 00:01 265.335 225.666 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 > 13 00:02 444.369 236.627 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 > 14 00:03 712.987 244.507 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 15 00:05 1.105.819 250.688 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 16 00:06 1.662.474 255.113 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 17 00:09 2.448.383 257.936 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 18 00:14 3.549.358 258.999 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 19 00:20 4.997.370 260.741 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 20 00:27 6.939.724 260.618 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 21 00:37 9.331.828 261.008 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 22 00:50 12.634.594 261.032 +6.75 Bf5xd3 Kf3g4 Bg5c1 g3xh2 Kh1xh2 Kg4h4 >Bd3f5 Kh4h5 Bf5xh3 Kh5h4 Bh3e6 Kh4h5 Be6f5 Kh5h4 > 22 02:25 34.944.570 247.097 +16.60 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3 >Bg5c1 g3g2 Bf5xh3 Kf3e2 Bh3xg2 Ke2d1 Bc1e3 Kd1c2 > 23 02:44 39.836.036 247.997 +16.66 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3 >Bg5c1 g3g2 Bf5xh3 Kf3e2 Bh3xg2 Ke2d1 Bc1e3 Kd1c2 > 24 05:03 71.486.462 241.254 +M75 Kh1g1 d3d2 Bg5xd2 Kf3e2 Bd2g5 Ke2f3 >Bg5c1 g3g2 Bf5xh3 Kf3e4 Bh3xg2+ Ke4f5 Bg2f3 Kf5g6 > 3/4/2006 1:43:36 PM, Time for this analysis: 00:08:56, Rated time: 16:39 > >0 of 1 matching moves >3/4/2006 1:43:36 PM, Total time: 12:08:59 AM >Rated time: 16:39 = 999 Seconds
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